According to American Community Survey in 2009, Americans reporting British ancestry are 40,234,652, or 13.0% of the total U.S. population, a significant drop from the 1980 United States Census where 49,598,035 reported as having English ancestry and 61,311,449 reported as having British ancestry. Using the self reported 2010 census figures British Americans are the second largest European ancestry group after German Americans. However, this figure is likely a serious undercount, as a large proportion of Americans of British descent have a tendency (since the introduction of a new 'American' category in the 2000 census) to identify as simply Americans Eight out of the ten most common surnames in the United States are of British origin.